Refrigerating-machine.



G. L ZlSCH.

REFRIGERATING MACHINE.

APPUCATION EILED 1AN.10.19|B.

l,282,5l 6.. Patented Oct. 22, 1918.

TTORNEY section on line 1,' 1,

GEORGE J. ZISCH, 0F NEWARK', NEW JERSEY.

REFBIGERATING-M ACHINE.

Specication of Letters Patent.

Patented Oct. 22, 1918.

Application filed January 10, 1918. Serial No. 211,146.

To all whom t 'may concern:

Be it known that I, GEORGE J. ZiscH, a subject of the Emperor of Germany, residing at Newark, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Refrigerating-Machines, of whlch the following is a specification.

This invention relates to a refrigerating machine which is adapted to produce a low temperature in the refrigerating element in the well known manner of compressing a chemical which is condensed and then volatilized in the refrigerating element from which it is drawn and again conducted to the compressing mechanism.

The invention isa machine of this type which is constructed to be used in a small space so that it does not take up much room, andxone in which the di'erent parts are closely assembled whereby the machine can be used for refrigeration in stores and homes replacing the usual ice chamber of ice-boxes with its refrigerating element.

The vinvention is a machine of this type which is provided with a chamber and suitable 4pumps inside of the chamber, all the pumps Communicatin with the chamber, the chamber being provided on its outside with a condensing tank in which the condensing coil is laced. A suitable motor can be mounted) on the frame for operating the pumps of the machine, and the whole device is one in .which the cooling of the motors is aided by the surrounding of the chamber with the condensing tank.

This application discloses the identical subject-matter shown in my application Serial Number 7 59,641, filed April K8, 1913.

The invention is illustrated in the accompanying drawing, in which Figure lis a in Fig. 2. Fig. 2 is a section on line 2, 2, in Fig. 1. Fig. 3 is a cross section of the suction pump used in the chamber.

The machine consists of a base 10 and the top 11, the top being referably provided with a suitable lid 12 w iich can be securely fastened in place and kept air tight when the machine is operating. Between the top and the bottom extend the walls 13 which, with the top and bottom, inclose a chamber 14. Mounted in the chamber are the comression pumps 15 and a suction pump 16. n the compression pumps are mounted the pistons 17 which are operated from the cranks 18 of the shaft 19, and the shaft-19 being provided with a gear 20 which in turn is operated from the gear 21 on the drivingshaft 22, the driving-shaft 22 having a crank 23 which operates the piston 24 which 1s to..be hereinafter described. The drivingshaft 22 extends beyond the chamber and is provided with a gear 25 which is driven from the gear 26 on a shaft 27, the gear being rotated by means of a worm-gear 28 in mesh with the worm 29 on the shaft 30 of the motor 31. The motor is mounted on the top 11 in the preferred form, althou h other dispositions of the motor can be ma e, as will be understood. It. will also be evident that different methods of driving the pumps and the motor can be used.

In operating the machine a suitable chemical, such as ammonia. ethylv chlorid or a similar well known chemical, is used and is forced by the pumps 15 from the chamber 11. A gaseous refrigerating agent passes through the openings 32 and is forced to open the check-valve 33, each of the compression pumps being provided with the same equipment of valve, the gas, after it )asses the valve, entering the small chamer 34 in the casing 35, the casings of the 'two compression pumps beinvjoined by a pipe 36 so that the compressed refrigerating agent can pass from the small chambers to a pipe 37 which extends up as at 38 and is formed into al condensing coil 39. The condensing coil 39 is in a tank formed by the wall 13 and a wall 40 which extends around the wall 13 at a distance therefroml The tank is filled with a suitable cooling liquid, such as water, which enters through the pipe 41 and is drawn off through a suitable outlet pipe 42. A faucet 13 controls the admission of water. The condensing coil emerges from the tank as at -t-t and is provided with a suitable valve A15 which permits it to pass after it is condensed so that it is volatilized or vaporized through the pipe t6 into a suitable refrigerating element 47. l show a straight pipe in the drawing, but it will be understood that this refrigerating element can be a coil or a tank or any other suitable device in which the expanded chemical produces a very low temperature which in turn is transmitted to the article to be cooled or frozen. The end 48 of the refrigerating element is connected, as in Fig. 3, to the bot'- tom 10 ofthe machine by means of a box 49 which contains a suitable check-valve 50.

tion pump makes two strokes to one stroke oi" each of the compression pumps. This maintains the same pressure in the chamber so that the material, when it is pumped by the compression pumps, is in condition to be condensed in the coil 39.

It will be noticed that there is a great economy in space on account of the wall 13 acting as the outer wall of the chamber and also the innerwall of the tank, the condensing tank having a cooling influence on the chamber and its working parts within.

This machine takes up very little room and is particularly adapted for use in houses and `stores. is easily manipulated, and when once it is set in motion it is somewhat automatic in its operation and maintains a steady low temperature. its use of chemicals, since the chemical employed has but small path of travel, the chamberand the compression and suction pumps being grouped in a manner to make the passage of the chemical short between its exit from the freezing element and its entrance into the condensing coil.

Having thus described my invention, what I claim is:

1. A refrigerating machine comprising a chamber, a compression pump in the cha1nber, a suction pump in the chamber, a condensing tank surrounding the chamber, a condensing coil in the tank. a connection `from'the condensing coil to the compression pump, a refrigerating element, a connection from the refrigerating element to the coil, a connection from the refrigerating element to the suction pump, and means for operating the pumps.

2. A refrigerating machine comprising a chamber, compressing pumps in the chamber, a suction pump in the chamber, a condensing tank surrounding the chamber, a

`rounding the chamber,

It is also economical inA condensing coil in the tank, a connection from the condensing coil to the compression pumps, a refrigerating element, a connection from the refrigerating element to the coil, a connection from the refrigerating element to the suction pump, a connection between the pumps for operating them in their proper cadence, and means extending to the exterior of the chamber for operating the pumps.

3. A refrigerating machine comprising an inclosed chamber, an inclosed tank surcompression pumps in the chamber and in communication therewith, a suction pump in the chamber and in communication therewith, a coil in the tank and surrounding the chamber, a connection from the coil to the compression pumps, a refrigerating element connected at one end to the coil, and a connection from the refrigerating element to the suction pump.

1. A refrigerating machine comprising a chamber, compression pumps in the chamber, a suction pump in the chamber geared with the compression pumps,l a condensing tank surrounding the'chamber, a condensing coil in the tank, a pipe for connecting the condensing coil aud compression pumps, a efrigerating element, a pipe for connecting the refrigerating element and said coil, a pipe for connecting the refrigerating element and suction pump, and a motor connected to one of the gears for operating the pumps.

5. A refrigerating machine comprising a chamber, compression pumps in the chamber, a suction pump in the chamber arranged between the compression pumps and being geared to said compression pumps, a condensing tank surrounding the chamber, a condensing coil ih the tank, a refrigerating element, said pumps, condensing coil and refrigerating element Ahaving communication with respect to each other and means for operating the pumps.

In testimony, that I claim the foregoing, I havehereunto set my hand this 29th day of December 1917.

GEORGE J. ZISCH. 

